JP7736665B2 - Optical image stabilization mechanism and control method - Google Patents

Description

This application claims priority to Chinese Patent Application No. 201910704671.9, entitled "OPTICAL IMAGE STABILIZATION APPARATUS AND CONTROL METHOD," filed with the China Patent Office on July 31, 2019, which is incorporated herein by reference in its entirety.

This application relates to optical fields, particularly optical image stabilization apparatuses and control methods.

The digital camera function of a mobile phone refers to whether the mobile phone can take still images or video clips using a built-in or external digital camera. As a new additional function for mobile phones, in recent years, the photography function of mobile phones has become one of the indicator features that consumers pay the most attention to. In terms of hardware, the implementation of mobile phone photography relies on the camera module to complete image collection, and in terms of software, it relies on algorithm operations to ultimately achieve the photography experience used by users. In addition to the imaging function, the most important technologies in current camera modules of mobile phones include zoom, image stabilization, and focusing technology.

However, as users become more and more dependent on mobile phones, there is an increasing demand for different focal lengths of camera modules, especially for telephoto photography. However, there are also some technical challenges that need to be overcome in terms of super telephoto photography . One is to increase the shaking sensitivity, and the other is to further refine the focusing requirements.

In the mobile phone photography process, the complementary metal oxide semiconductor (CMOS) chip requires a certain response time, and even longer exposure times are required, especially when photographing dark scenes. Long exposure times can cause image jitter, blurring the data transmitted by the image sensor and significantly reducing image quality. However, when taking photos by hand, the human body inevitably shakes, a phenomenon that is particularly severe when taking telephoto shots. Therefore, to eliminate this effect, mobile phone camera modules need to be equipped with image stabilization technology.

Embodiments of the present application provide an optical image stabilization mechanism that can be used with various camera lenses to solve the problem of image quality degradation caused by image jitter.

In consideration of this, a first aspect of an embodiment of the present application provides an optical image stabilization mechanism, which may include a first lens, a first reflector, a position sensor, and a control component, wherein the position sensor is connected to the control component.

The first lens is used for imaging and may be a convex lens, a concave lens, a flat mirror, or a combination of one lens or multiple lenses. In this embodiment of the present application, the shape of the first lens and the number of first lenses are not particularly limited. The shape of the first reflector may be circular, square, or another shape. In this embodiment of the present application, there is no particular limit to the shape.

After passing through the first lens, the optical signal is transmitted to the first reflector, where it is reflected and projected onto the imaging surface. If the first lens shakes during the process of transmitting the optical signal to the imaging surface, the position sensor detects shake information of the first lens and transmits the shake information to the control component. The shake information may include shake parameters such as the shake direction, shake frequency, and shake amplitude of the first lens. Next, based on the shake information detected by the position sensor, the control component controls the first reflector to rotate using the first preset direction as an axis. The first preset direction is not parallel to the normal direction of the first reflector. Therefore, when the first reflector rotates, the angle of incidence and the angle of reflection of the optical signal at the first reflector may change. In other words, when the first reflector rotates, the direction of the optical path of the optical signal may change.

From the above explanation, it can be seen that when the first lens shakes, the first reflector is controlled to rotate based on the shake information of the first lens, changing the direction of the optical path of the optical signal incident on the imaging surface and correcting the deviation in the direction of the optical path caused by the shake of the first lens. By compensating for the deviation in the direction of the optical path caused by the shake of the first lens, the position of the light spot formed on the imaging surface by the optical signal and the amplitude of the vibration caused by the shake of the first lens are reduced, and the stability of the position of the light spot formed on the imaging surface by the optical signal is maintained, thereby achieving an image stabilization effect.

In certain embodiments, when the first lens shakes, the control component may be further configured to control, based on the shake information, to rotate the first reflector using a second preset direction as an axis, where the second preset direction is not parallel to the first preset direction or the normal direction of the first reflector. Because the second preset direction is not parallel to the normal direction of the first reflector, when driving the first reflector to rotate using the second preset direction as an axis, the driving component can change the propagation direction of the optical signal after it is reflected by the first reflector, thereby achieving the compensation effect described above in which the first reflector rotates using the first preset direction as an axis. Note that in this embodiment, the rotational movement of the first reflector using the first preset direction as an axis and the rotational movement of the first reflector using the second preset direction as an axis can be performed simultaneously or separately. This is specifically controlled by the control component based on the shake information. In this embodiment, a two-axis optical image stabilization mechanism is provided by controlling the rotational movement of the first reflector using the first preset direction as an axis and the rotational movement of the first reflector using the second preset direction as an axis.

In certain embodiments, the optical image stabilization mechanism may further include an image sensor connected to the control component, the photosensitive surface of the image sensor being the imaging surface.

After the optical signal is projected onto the imaging surface, i.e., the photosensitive surface of the image sensor, the image sensor detects acutance information of the image formed after the optical signal is projected onto the photosensitive surface and transmits the acutance information to the control component. Therefore, the control component controls the movement of the first reflector based on the acutance information. When the first reflector moves, the length of the optical path of the optical signal changes as the first reflector moves, and the optical path is the propagation path of the optical signal from the first lens to the imaging surface.

Note that the direction in which the first reflector moves can be preset, for example, to the direction of the optical path or the normal direction of the reflective surface of the first reflector. When the first reflector moves, the length of the optical path of the optical signal also changes accordingly, i.e., the image distance changes, thereby enabling the optical signal to be clearly imaged on the photosensitive surface, resulting in a focusing effect.

In certain embodiments, the particular type of position sensor may be a CMOS, a charge-coupled device (CCD), another imaging device, or another reflective device. In this embodiment of the present application, the type of image sensor is not particularly limited.

In certain embodiments, the optical image stabilization mechanism may further include a second lens. The second lens is disposed between the first reflector and the imaging surface. After being reflected by the first reflector, the optical signal is projected onto the second lens, and after passing through the second lens, the optical signal is finally projected onto the imaging surface. It should be noted that the second lens serves to assist in imaging, and may be a convex or concave lens, and may include one lens or a combination of multiple lenses. The specific quantity and specific form are not limited herein.

In certain embodiments, the optical image stabilization mechanism may further include a second reflector. The second reflector and the first reflector are disposed on either side of the first lens, respectively. After acquiring an optical signal, the second reflector reflects the acquired optical signal back to the first lens. The optical signal is then reflected by the first reflector and finally projected onto the imaging surface.

When the first lens shakes, the control component can further control the second reflector to rotate in a second preset direction based on shake information of the first lens detected by the position sensor, where the second preset direction is not parallel to the first preset direction or the normal direction of the second reflector. Therefore, when the second reflector rotates, the direction of the optical path of the optical signal is also changed by driving, thereby achieving an image stabilization effect. It should be noted that the rotational movement of the second reflector using the second preset direction as an axis and the rotational movement of the first reflector using the first preset direction as an axis can be performed simultaneously or separately. This is specifically controlled by the control component based on the shake information. When the rotational movement of the second reflector using the second preset direction as an axis and the rotational movement of the first reflector using the first preset direction as an axis are simultaneously performed, a two-axis image stabilization effect can be achieved by combination.

In certain embodiments, the optical image stabilization mechanism may further include an image sensor connected to the control component, the photosensitive surface of the image sensor being the imaging surface.

After the optical signal is projected onto the imaging surface, i.e., the photosensitive surface of the image sensor, the image sensor detects acutance information of the image formed after the optical signal is projected onto the photosensitive surface and transmits the acutance information to the control component. Therefore, the control component controls the movement of the first reflector based on the acutance information. When the first reflector moves, the length of the optical path of the optical signal changes as the first reflector moves, and the optical path is the propagation path of the optical signal from the first lens to the imaging surface.

Note that the direction in which the first reflector moves can be preset, for example, to the direction of the optical path or the normal direction of the reflective surface of the first reflector. When the first reflector moves, the length of the optical path of the optical signal also changes accordingly, i.e., the image distance changes, thereby enabling the optical signal to be clearly imaged on the photosensitive surface, resulting in a focusing effect.

In certain embodiments, the optical image stabilization mechanism may further include a second lens. The second lens is disposed between the first reflector and the imaging surface. After being reflected by the first reflector, the optical signal is projected onto the second lens, and after passing through the second lens, the optical signal is finally projected onto the imaging surface. It should be noted that the second lens serves to assist in imaging and may be a convex or concave lens, and may be a single lens or a combination of multiple lenses. The specific quantity and specific form are not limited herein.

In certain embodiments, the optical image stabilization mechanism may further include a second lens. The second lens is disposed outside the second reflector, and the optical signal passes through the second lens before being projected onto the second reflector. The optical signal reflected by the second reflector then passes through the first lens, is then reflected by the first reflector, and is finally projected onto the imaging surface. It should be noted that the second lens serves to assist in imaging, and may be a convex or concave lens, and may be a single lens or a combination of multiple lenses. The specific quantity and specific form are not limited herein.

In certain embodiments, the optical image stabilization mechanism may further include a second lens and a third lens. The second lens is disposed outside the second reflector, and the third lens is disposed on the optical path between the first reflector and the imaging surface. The optical signal sequentially passes through the second lens, the second reflector, the first lens, the first reflector, and the third lens, and is finally projected onto the imaging surface. The second lens and the third lens serve to assist in imaging, and it should be noted that each of the second lens and the third lens may be a convex lens or a concave lens, and may be a single lens or a combination of multiple lenses. The specific quantity and specific form are not limited herein.

In certain embodiments, the optical image stabilization mechanism may further include a second reflector. The second reflector is disposed between the first reflector and the imaging surface. After being reflected by the first reflector, the optical signal is projected onto the second reflector and reflected by the second reflector onto the imaging surface.

When the first lens shakes, the control component is further configured to control the second reflector to rotate using a second preset direction as an axis based on shake information of the first lens detected by the position sensor, where the second preset direction is not parallel to the first preset direction or the normal direction of the second reflector. Therefore, when the second reflector rotates, the direction of the optical path of the optical signal is also changed by driving, thereby achieving an image stabilization effect. It should be noted that the rotational movement of the second reflector using the second preset direction as an axis and the rotational movement of the first reflector using the first preset direction as an axis can be performed simultaneously or separately. This is specifically controlled by the control component based on the shake information. By simultaneously performing the rotational movement of the second reflector using the second preset direction as an axis and the rotational movement of the first reflector using the first preset direction as an axis, a two-axis image stabilization effect can be achieved.

In certain embodiments, the optical image stabilization mechanism may further include an image sensor connected to the control component, where the photosensitive surface of the image sensor is the imaging surface. After the optical signal is projected onto the imaging surface, i.e., the photosensitive surface of the image sensor, the image sensor detects acutance information of the image formed after the optical signal is projected onto the photosensitive surface and transmits the acutance information to the control component. After receiving the acutance information detected by the image sensor, the control component controls the first reflector and/or the second reflector to move based on the acutance information. When the first reflector and/or the second reflector move, the length of the optical path of the optical signal changes as the first reflector and/or the second reflector moves, and the optical path is the propagation path of the optical signal from the first lens to the imaging surface.

Note that the direction in which the first reflector and/or the second reflector move can be preset, for example, to the direction of the optical path or the normal direction of the reflective surface of the first reflector and/or the second reflector. When the first reflector and/or the second reflector move, the length of the optical path of the optical signal also changes accordingly, i.e., the image distance changes, thereby enabling the optical signal to be clearly imaged on the photosensitive surface, resulting in a focusing effect.

In certain embodiments, the optical image stabilization mechanism may further include a second lens. The second lens is disposed between the first reflector and the second reflector. After being reflected by the first reflector, the optical signal passes through the second lens and is projected onto the second reflector, and after being reflected by the second reflector, the optical signal is finally projected onto the imaging surface. It should be noted that the second lens serves to assist in imaging and may be a convex or concave lens, and may be a single lens or a combination of multiple lenses. The specific quantity and specific form are not limited herein.

In certain embodiments, the optical image stabilization mechanism may further include a second lens. The second lens is disposed between the second reflector and the imaging surface. After being reflected by the second reflector, the optical signal passes through the second lens and is finally projected onto the imaging surface. It should be noted that the second lens serves to assist in imaging and may be a convex or concave lens, and may be a single lens or a combination of multiple lenses. The specific quantity and specific form are not limited herein.

In certain embodiments, the optical image stabilization mechanism may further include a second lens and a third lens. The second lens is disposed between the first reflector and the second reflector, and the third lens is disposed between the second reflector and the imaging surface. The optical signal sequentially passes through the first lens, the first reflector, the second lens, the second reflector, and the third lens, and is finally projected onto the imaging surface. The second lens and the third lens serve to assist in imaging, and it should be noted that each of the second lens and the third lens may be a convex lens or a concave lens, and may be a single lens or a combination of multiple lenses. The specific quantity and specific form are not limited herein.

Based on the optical image stabilization mechanism of the first aspect, a second aspect of the present embodiment provides a control component, which may include a drive member and a processing chip.

The processing chip is configured to receive shake information of the first lens detected by the position sensor in the first aspect, and after processing the shake information, the processing chip controls the driving member based on the results of processing the shake information to drive the first reflector and/or the second reflector to perform the rotational movement described in the first aspect, thereby realizing the image stabilization function.

In certain embodiments, the processing chip in the control component is further configured to receive acutance information related to an image formed after the optical signal is projected onto the photosensitive surface and detected by the image sensor. After processing the acutance information, the processing chip is further configured to control the driving member to drive the first reflector and/or the second reflector based on the results of processing the acutance information to perform the movement of the first reflector described in the first aspect, thereby achieving a focusing effect.

In certain embodiments, the control component may further include a voice coil motor (VCM) driver module, the VCM driver module connected to the processing chip.

The processing chip is further configured to receive acutance information related to an image formed after the optical signal is projected onto the photosensitive surface and detected by the image sensor. After processing the acutance information, the processing chip is further configured to control the VCM driver module to drive the first lens to move along its central axis based on the processed acutance information. When the first lens moves along its central axis, the length of the propagation path of the optical signal between the first lens and the photosensitive surface changes, i.e., the image distance changes, thereby achieving a focusing effect. Note that the operation of the VCM driver module to drive the first lens to move along the central axis and the operation of the driving member to drive the first reflector and/or the second reflector to move can be performed simultaneously or separately. When the VCM driver module drives the first lens to move along the central axis and the drive member drives the first reflector and/or the second reflector to move simultaneously, a fine or coarse focusing function can be achieved. Coarse focusing means that a wider focus range is achieved.

Based on the control component of the second aspect, a third aspect of the present embodiment provides a drive member, which may include a first coil and a first magnet.

The first reflector is connected to the first outer frame using a first cantilever beam, the first coil is fixed to the rear surface or edge position of the first reflector, and the first magnet is fixed to the first outer frame.

The first coil is an "infinity" coil, divided into a left half coil and a right half coil, and is bilaterally symmetrical. After power is applied to the first coil, the magnetic field between the left half coil and the first magnet generates an inward ampere force perpendicular to the first reflector, and the magnetic field between the right half coil and the first magnet generates an outward ampere force perpendicular to the first reflector. These forces drive the first reflector to rotate about the second rotation axis.

After receiving the shake information of the first lens detected by the position sensor, the processing chip processes the shake information and controls the amount of power applied to the first coil based on the processing results. After applying power to the first coil, opposite ampere forces are generated in the left and right halves of the first coil under the effect of the magnetic field of the first magnet, driving the first reflector fixedly connected to the first coil to rotate it using the first preset direction as its axis. The rotation axis may be the first cantilever, and in this case, the first preset direction is the direction of the first cantilever. Based on the processing results, the processing chip controls the amount of power applied to the first coil, including controlling the direction and value of the current in the first coil, and controls the rotation direction and value of the rotation angle of the first reflector.

In certain embodiments, the drive member may further include a second coil. The second coil is fixed to a rear surface or edge of the first reflector and is insulated from the first coil. The support frame is connected to the first reflector using a first axis of rotation and to the first outer frame using a second axis of rotation. The second coil is a "figure-eight" coil, resembling the shape obtained after rotating the first coil 90 degrees, divided into an upper half coil and a lower half coil, and longitudinally symmetrical. After applying power to the second coil, the magnetic field between the upper half coil and the first magnet generates an inward ampere force perpendicular to the first reflector, and the magnetic field between the lower half coil and the first magnet generates an outward ampere force perpendicular to the first reflector, which drives the first reflector to rotate about the second axis of rotation. After receiving the wobble information of the first lens detected by the position sensor, the processing chip processes the wobble information and controls the amount of power applied to the second coil based on the processing result. After applying power to the second coil, under the effect of the magnetic field of the first magnet, opposite ampere forces are generated in the upper and lower halves of the second coil, respectively, which drive the first reflector fixedly connected to the second coil to rotate using the second preset direction as an axis. In this embodiment, the first preset direction is the direction of the second rotation axis, and the second preset direction is the direction of the first rotation axis.

In certain embodiments, the driving member may further include a second coil and a second magnet. The second reflector is connected to the second outer frame using a second cantilever, the second coil is fixed to the rear surface or edge of the second reflector, and the second magnet is fixed to the second outer frame. The second coil is an "eight-shaped" coil. After receiving the wobble information of the first lens detected by the position sensor, the processing chip processes the wobble information and controls the amount of power applied to the second coil based on the processing result. After applying power to the second coil, under the action of the magnetic field of the second magnet, opposite ampere forces are generated in the upper and lower halves of the second coil, respectively, and these forces drive the second reflector fixedly connected to the second coil to rotate using the second preset direction as an axis. In this embodiment, the second preset direction may be the direction of the second cantilever.

In a specific embodiment, the driving member may include a first coil, a first magnet, a second coil, and a third coil. For the first coil, the first magnet, and the second coil, please refer to the relevant descriptions above. Details will not be described again here. The third coil is fixed to the rear surface or edge of the first reflector and is insulated from the first coil and the second coil. Alternatively, the third coil may be fixed to the support frame. The processing chip is related to the image formed after the optical signal is projected onto the photosensitive surface, and after receiving acutance information detected by the image sensor, processes the acutance information and controls the amount of power applied to the third coil based on the processing result. After applying power to the third coil, an ampere force perpendicular to the plane in which the third coil is located is generated under the action of the magnetic field of the first magnet, and this force drives and moves the first reflector fixedly connected to the third coil. Based on the processing results, the processing chip controls the amount of power applied to the third coil, including controlling the direction and value of the current in the third coil, and controls the magnitude and direction of movement of the first reflector.

In certain embodiments, the third coil may alternatively be disposed on the second reflector, specifically fixed to the rear surface or edge of the second reflector, and insulated from the second coil.

In certain embodiments, the optical image stabilization mechanism may further include a first outer frame and a support frame, and the drive member may include a first coil, a first electromagnet, a second electromagnet, a third electromagnet, and a fourth electromagnet.

The first coil is a rectangular coil or a square coil, and a current can flow through the first coil in a clockwise or counterclockwise direction. The first reflector is connected to the support frame using a second rotation axis, the support frame is connected to the first outer frame using a first rotation axis, the first coil is disposed and fixed at a rear surface or edge position of the first reflector, and the first electromagnet and the second electromagnet are separately fixed to the first outer frame.

After receiving the shake information of the first lens detected by the position sensor, the processing chip processes the shake information and, based on the processing results, controls the power applied to the coils that apply magnetic fields to the first electromagnet, the second electromagnet, the third electromagnet, and/or the fourth electromagnet, for example by controlling the current value and current direction, thereby generating a magnetic field in a predetermined direction around the first coil, whereby Ampere forces in different directions are generated on each of the four sides of the first coil, and these forces drive the first reflector, which is fixedly connected to the first coil, to rotate or move, thereby achieving an image stabilization function or a focusing function.

Based on the related structures of the first, second, and third aspects, a fourth aspect of the present embodiment provides a control method, which may include the following steps:

The optical image stabilization mechanism detects shake information about the first lens. Specifically, when the first lens shakes, the position sensor of the optical image stabilization mechanism detects shake information such as the shake displacement, shake frequency, and shake direction of the first lens. Please note that the term "position sensor" in this specification does not refer to a special sensor, but generally refers to a sensor that can detect shake information about the first lens.

After detecting and determining shake information of the first lens, the optical image stabilization mechanism determines a first control parameter based on the shake information. Specifically, after receiving the shake information detected by the position sensor, the processing chip processes the shake information according to a preset first algorithm to obtain the first control parameter. The preset first algorithm can then be updated using a network or based on setting parameters input by the user. Specifically, the first control parameter can be a parameter that instructs the first reflector to rotate. Specifically, the first control parameter can include rotation direction information and rotation angle information.

After determining the first control parameter, the optical image stabilization mechanism uses a control component to control the rotation of the first reflector based on the first control parameter. Specifically, after determining the first control parameter, the optical image stabilization mechanism can determine the direction and value of the current that needs to be loaded into the first coil and the direction and value of the current that needs to be loaded into the second coil based on the first control parameter. This process can be performed using a preset third algorithm. The third algorithm can then be updated using a network or based on setting parameters entered by the user.

In a specific embodiment, after an optical signal is projected onto the photosensitive surface of the image sensor, the image sensor detects acutance information of an image formed on the photosensitive surface by the optical signal. After receiving the acutance information detected by the image sensor, the processing chip processes the acutance information according to a second preset algorithm to obtain second control parameters. The second preset algorithm can then be updated using a network or based on setting parameters entered by a user. The second control parameters include a parameter instructing the first reflector to move and a parameter instructing the first lens to move. Specifically, the second control parameters can include movement direction information and movement distance information. After determining the second control parameters, the optical image stabilization mechanism can determine the current direction and current value to be loaded into the third coil and the current direction and current value to be loaded into the VCM driver module based on the second control parameters. This process can be implemented using a fourth preset algorithm. The fourth algorithm can then be updated using the network or based on configuration parameters entered by the user.

From the above technical solutions, it can be seen that the embodiments of the present application have the following advantages:

An embodiment of the present application provides an optical image stabilization mechanism including a first lens, a first reflector, a position sensor, and a driving component. After passing through the first lens, an optical signal is reflected by the first reflector and then projected onto an imaging surface. The position sensor is configured to detect shake information of the first lens and transmit the shake information to the driving component. The driving component applies a driving force based on the shake information to drive the first reflector to rotate it using a first preset direction as an axis. Because the first preset direction is a direction that is not parallel to the normal direction of the first reflector, when the first reflector rotates using the first preset direction as an axis, the angle of incidence and the angle of reflection of the optical signal at the first reflector also change with the rotation. In other words, the propagation direction of the optical signal is changed by rotating the first reflector of the optical image stabilization mechanism, and vibrations in the optical path caused by shaking of the first lens can be compensated for by changing the direction of the optical path, thereby providing an optical image stabilization mechanism.

FIG. 1 is a schematic diagram of lens imaging. 1 is a schematic diagram of the projection of a light ray after the light ray passes through a lens module. FIG. 1 is a schematic diagram of the projection of a light ray after the light ray passes through the lens module and the lens is shaken; FIG. 1 is a schematic diagram of an optical image stabilization mechanism according to an embodiment of the present application. FIG. 10 is a schematic diagram of an optical image stabilization mechanism according to another embodiment of the present application. FIG. 2 is a structural diagram of an optical path of an optical image stabilization mechanism according to an embodiment of the present application. FIG. 10 is a structural diagram of an optical path of an optical image stabilization mechanism according to another embodiment of the present application. FIG. 10 is a schematic diagram of an optical image stabilization mechanism according to another embodiment of the present application. FIG. 10 is a schematic diagram of an optical image stabilization mechanism according to another embodiment of the present application. FIG. 10 is a structural diagram of an optical path of an optical image stabilization mechanism according to another embodiment of the present application. FIG. 10 is a structural diagram of an optical path of an optical image stabilization mechanism according to another embodiment of the present application. FIG. 10 is a structural diagram of an optical path of an optical image stabilization mechanism according to another embodiment of the present application. FIG. 10 is a structural diagram of an optical path of an optical image stabilization mechanism according to another embodiment of the present application. FIG. 10 is a schematic diagram of an optical image stabilization mechanism according to another embodiment of the present application. FIG. 10 is a schematic diagram of an optical image stabilization mechanism according to another embodiment of the present application. FIG. 10 is a structural diagram of an optical path of an optical image stabilization mechanism according to another embodiment of the present application. FIG. 10 is a structural diagram of an optical path of an optical image stabilization mechanism according to another embodiment of the present application. FIG. 10 is a structural diagram of an optical path of an optical image stabilization mechanism according to another embodiment of the present application. FIG. 10 is a structural diagram of an optical path of an optical image stabilization mechanism according to another embodiment of the present application. FIG. 1 is a schematic diagram of a control component according to an embodiment of the present application. FIG. 10 is a schematic diagram of a control component according to another embodiment of the present application. 1 is a schematic diagram of a drive member according to an embodiment of the present application; FIG. 10 is a schematic diagram of a drive member according to another embodiment of the present application. FIG. 10 is a schematic diagram of a drive member according to another embodiment of the present application. FIG. 10 is a schematic diagram of a drive member according to another embodiment of the present application. FIG. 10 is a schematic diagram of a drive member according to another embodiment of the present application. FIG. 2 is a schematic diagram of a control method according to an embodiment of the present application;

The optical image stabilization mechanism provided in the embodiment of the present application will be described in detail below with reference to the attached drawings.

The optical image stabilization mechanism in the present embodiment may be applied to multiple types of lenses, including, but not limited to, periscope or various types of camera lenses, for example, in a lens module of a mobile phone.

The following explains some of the terms used in the embodiments of this application.

Focusing is the process of changing the distance between the imaging plane and the lens based on different positions at which objects at different distances are clearly imaged behind the lens, thereby clearly imaging the subject being photographed. Because depth of field exists in all imaging systems, if the subject being photographed is beyond the depth of field, the image will be blurred after the subject is photographed. Focusing is required to ensure that the subject being photographed appears clear. Focusing is also called focus adjustment. By fine-tuning the image distance of the optical lens forward or backward, a one-to-one corresponding focusing distance is achieved based on the design value. In this way, the subject being photographed is kept within the depth of field and clearly imaged.

Depth of field is the depth required for a clear image in an optical imaging system. Depth of field is a physical phenomenon, but different optical systems have different depth of field values. Figure 1 is a schematic diagram of lens imaging, where ΔL represents the depth of field and L represents the focusing distance. The depth of field value is related to the optical lens parameters focal length f and the lens f-stop (F-number), and is also related to the circle of confusion, and its diameter δ, which can be distinguished by the image collector CMOS used.

The relationships between ΔL, f, F, and δ are shown in Equations 1, 2, and 3 below.

Equation 1: ΔL ₁ =FδL ² /(f ² +FδL)

Equation 2: ΔL ₂ =FδL ² /(f ² −FδL)

Equation 3: ΔL=ΔL ₁ +ΔL ₂ =2f ² FδL ² /(f ⁴ −F ² δ ² L ² )

Based on the above explanation, to obtain high-quality images, the mobile phone camera needs to perform focusing. The distance between the CMOS and the lens group is different when capturing images at different distances. For example, in telephoto photography, the object distance is very long, so the image distance can be found to be very short according to the imaging formula 1/f = 1/v + 1/u (where f represents the focal length, which is a positive number for a convex lens or a negative number for a concave lens; u represents the object distance; and v represents the image distance, which is a positive number for a real image or a negative number for a virtual image). However, in macro photography, the object distance is very short, and the image distance needs to be relatively long accordingly. This imposes fine focusing requirements.

Furthermore, during the mobile phone photography process, CMOS chips require a certain response time. Especially when photographing dark scenes, longer exposure times are required to capture sufficient incident light when there is insufficient light. When using long exposure times (i.e., slow shutter speeds), image jitter occurs within a single shutter period. After the lens shakes, the data transmitted by the image sensor becomes blurred, significantly reducing image quality and resulting in "paste." Figure 2A is a schematic diagram of the projection of a light ray after it passes through the lens module. After shaking occurs, the projection point of the light ray on the photosensitive element is offset, as shown in Figure 2B. However, the human body inevitably shakes during manual photography, a phenomenon that is particularly severe during telephoto photography. Therefore, to eliminate this effect, mobile phone camera modules need to be equipped with image stabilization technology.

One embodiment of the present application provides an optical image stabilization mechanism. For details, see FIG. 3A below. FIG. 3A is a schematic diagram of an embodiment of an optical image stabilization mechanism according to one embodiment of the present application. The optical image stabilization mechanism includes a first lens 301, a first reflector 302, a position sensor 303, and a control component 304, where the position sensor 303 is connected to the control component 304.

The first lens 301 is used for imaging and may be a convex lens, a concave lens, a plane mirror, or a combination of one lens or multiple lenses. In this embodiment of the present application, the shape of the first lens 301 and the number of first lenses 301 are not particularly limited. The shape of the first reflector 302 may be circular, square, or another shape. In this embodiment of the present application, there is no particular limit to the shape.

After passing through the first lens 301, the optical signal is transmitted to the first reflector 302, where it is reflected and projected onto the imaging surface. If the first lens 301 shakes during the process of transmitting the optical signal to the imaging surface, the position sensor 303 detects shaking information of the first lens 301 and transmits the shaking information to the control component 304. The shaking information may include shaking parameters such as the shaking direction, shaking frequency, and shaking amplitude of the first lens 301. Then, based on the shaking information detected by the position sensor 303, the control component 304 controls the first reflector 302 to rotate using the first preset direction as an axis. The first preset direction is not parallel to the normal direction of the first reflector 302. Therefore, when the first reflector 302 rotates, the angle of incidence and the angle of reflection of the optical signal at the first reflector 302 can be changed. In other words, when the first reflector 302 rotates, the direction of the optical path of the optical signal can be changed.

From the above explanation, it can be seen that when the first lens 301 shakes, the first reflector 302 can be controlled to rotate based on the shake information of the first lens 301, thereby changing the direction of the optical path of the optical signal incident on the imaging surface and compensating for the deflection of the optical path direction caused by the shake of the first lens 301. By compensating for the deflection of the optical path direction caused by the shake of the first lens 301, the position of the light spot formed on the imaging surface by the optical signal is maintained, and the amplitude of the vibration caused by the shake of the first lens 301 is reduced, thereby maintaining the stability of the position of the light spot formed on the imaging surface by the optical signal, thereby achieving an image stabilization effect.

3A, when the first lens 301 shakes, the control component 304 may be further configured to control the first reflector 302 to rotate using a second preset direction as an axis based on the shaking information, where the second preset direction is not parallel to the first preset direction or the normal direction of the first reflector 302. Because the second preset direction is not parallel to the normal direction of the first reflector 302, when the first reflector 302 is rotated using the second preset direction as an axis, the driving component may also change the propagation direction of the optical signal after the optical signal is reflected by the first reflector 302, thereby achieving the compensatory effect described above in which the first reflector 302 rotates using the first preset direction as an axis. It should be noted that in this embodiment, the rotational movement of the first reflector 302 using the first preset direction as an axis and the rotational movement of the first reflector 302 using the second preset direction as an axis can be performed simultaneously or separately. This is specifically controlled by the control component 304 based on the shake information. In this embodiment, a two-axis optical image stabilization mechanism is provided by controlling the rotational movement of the first reflector 302 using the first preset direction as an axis and the rotational movement of the first reflector 302 using the second preset direction as an axis.

In a specific embodiment, based on the embodiment shown in FIG. 3A, please refer to FIG. 3B below in detail. FIG. 3B is a schematic diagram of another embodiment of an optical image stabilization mechanism according to an embodiment of the present application. The optical image stabilization mechanism may further include an image sensor 305 connected to the control component 304, with the photosensitive surface of the image sensor 305 being the imaging surface.

After the optical signal is projected onto the imaging surface, i.e., the photosensitive surface of the image sensor 305, the image sensor 305 detects acutance information of the image formed after the optical signal is projected onto the photosensitive surface and transmits the acutance information to the control component 304. Therefore, the control component 304 controls the movement of the first reflector 302 based on the acutance information. When the first reflector 302 moves, the length of the optical path of the optical signal changes as the first reflector 302 moves, and the optical path is the propagation path of the optical signal from the first lens 301 to the imaging surface.

It should be noted that the direction in which the first reflector 302 moves can be preset, for example, set to the direction of the optical path or the normal direction of the reflective surface of the first reflector 302. When the first reflector 302 moves, the length of the optical path of the optical signal also changes accordingly, i.e., the image distance changes, thereby allowing the optical signal to be clearly imaged on the photosensitive surface, resulting in a focusing effect.

In certain embodiments, the particular type of image sensor 305 may be a CMOS, a CCD, another imaging device, or another reflective device. In this embodiment of the present application, the type of image sensor 305 is not particularly limited.

Figures 3A and 3B briefly explain the positional relationships between the first lens 301, the first reflector 302, the position sensor 303, and the control component 304. See 3C below. Figure 3C is a schematic diagram of an embodiment of the positional relationship between the first lens 301 and the first reflector 302.

In certain embodiments, the optical image stabilization mechanism may further include a second lens 307. For details, see FIG. 3D below. FIG. 3D is a schematic diagram of an embodiment of the positional relationship between the first lens 301, the second lens 307, the first reflector 302, and the imaging surface. As shown in FIG. 3D, the second lens 307 is disposed between the first reflector 302 and the imaging surface. After being reflected by the first reflector 302, the optical signal is projected onto the second lens 307, and after passing through the second lens 307, the optical signal is finally projected onto the imaging surface. Note that the second lens 307 serves to assist in imaging, and may be a convex or concave lens, and may include one lens or a combination of multiple lenses. The specific quantity and specific form are not limited herein.

In a specific embodiment, based on FIG. 3A, please refer in detail to FIG. 4A below. FIG. 4A is a schematic diagram of another embodiment of an optical image stabilization mechanism in accordance with an embodiment of the present application. The optical image stabilization mechanism may further include a second reflector 306.

The second reflector 306 and the first reflector 302 are respectively arranged on either side of the first lens 301. After acquiring an optical signal, the second reflector 306 reflects the acquired optical signal back to the first lens 301. The optical signal is then reflected by the first reflector 302 and finally projected onto the imaging surface.

When the first lens 301 shakes, the control component 304 can further control the second reflector 306 to rotate in a second preset direction based on the shake information of the first lens 301 detected by the position sensor 303, where the second preset direction is not parallel to the first preset direction or the normal direction of the second reflector 306. Therefore, when the second reflector 306 rotates, the direction of the optical path of the optical signal is also changed by driving, thereby achieving a camera shake correction effect. It should also be noted that the rotational movement of the second reflector 306 by using the second preset direction as an axis and the rotational movement of the first reflector 302 by using the first preset direction as an axis can be performed simultaneously or separately. This is specifically controlled by the control component 304 based on the shake information. By simultaneously rotating the second reflector 306 using the second preset direction as its axis and rotating the first reflector 302 using the first preset direction as its axis, a two-axis image stabilization effect can be achieved through this combination.

In a specific embodiment, based on the embodiment shown in FIG. 4A, please refer to FIG. 4B below in detail. FIG. 4B is a schematic diagram of another embodiment of an optical image stabilization mechanism according to an embodiment of the present application. The optical image stabilization mechanism may further include an image sensor 305 connected to the control component 304, with the photosensitive surface of the image sensor 305 being the imaging surface.

After the optical signal is projected onto the imaging surface, i.e., the photosensitive surface of the image sensor 305, the image sensor 305 detects acutance information of the image formed after the optical signal is projected onto the photosensitive surface and transmits the acutance information to the control component 304. Therefore, the control component 304 controls the movement of the first reflector 302 based on the acutance information. When the first reflector 302 moves, the length of the optical path of the optical signal changes as the first reflector 302 moves, and the optical path is the propagation path of the optical signal from the first lens 301 to the imaging surface.

It should be noted that the direction in which the first reflector 302 moves can be preset, for example, set to the direction of the optical path or the normal direction of the reflective surface of the first reflector 302. When the first reflector 302 moves, the length of the optical path of the optical signal also changes accordingly, i.e., the image distance changes, thereby allowing the optical signal to be clearly imaged on the photosensitive surface, resulting in a focusing effect.

Figures 4A and 4B briefly explain the positional relationships between the first lens 301, the first reflector 302, the second reflector 306, the position sensor 303, and the control component 304. Please refer to Figure 4C below, which is a schematic diagram of an embodiment of the positional relationships between the first lens 301, the first reflector 302, and the second reflector 306.

In certain embodiments, the optical image stabilization mechanism may further include a second lens 307. For details, see FIG. 4D below. FIG. 4D is a schematic diagram of an embodiment of the positional relationship between the first lens 301, the second lens 307, and the first reflector 302. As shown in FIG. 4D, the second lens 307 is disposed between the first reflector 302 and the imaging surface. After being reflected by the first reflector 302, the optical signal is projected onto the second lens 307, and after passing through the second lens 307, the optical signal is finally projected onto the imaging surface. Note that the second lens 307 serves to assist in imaging and may be a convex or concave lens, and may be a single lens or a combination of multiple lenses. The specific quantity and specific form are not limited herein.

In certain embodiments, the optical image stabilization mechanism may further include a second lens 307. For details, see FIG. 4E below. FIG. 4E is a schematic diagram of another embodiment of the positional relationship between the first lens 301, the second lens 307, and the first reflector 302. As shown in FIG. 4E, the second lens 307 is disposed outside the second reflector 306, and the optical signal passes through the second lens 307 before being projected onto the second reflector 306. The optical signal reflected by the second reflector 306 then passes through the first lens 301, is then reflected by the first reflector 302, and is finally projected onto the imaging surface. Note that the second lens 307 serves to assist in imaging and may be a convex or concave lens, and may be a single lens or a combination of multiple lenses. The specific quantity and specific form are not limited herein.

In certain embodiments, the optical image stabilization mechanism may further include a second lens 307 and a third lens 308. For details, see FIG. 4F below. FIG. 4F is a schematic diagram of an embodiment of the positional relationship between the first lens 301, the second lens 307, the third lens 308, and the first reflector 302. As shown in FIG. 4F , the second lens 307 is disposed outside the second reflector 306, and the third lens 308 is disposed on the optical path between the first reflector 302 and the imaging surface. An optical signal sequentially passes through the second lens 307, the second reflector 306, the first lens 301, the first reflector 302, and the third lens 308, and is finally projected onto the imaging surface. It should be noted that the second lens 307 and the third lens 308 serve to assist in imaging, and each of the second lens 307 and the third lens 308 may be a convex lens or a concave lens, and may be one lens or a combination of multiple lenses. The specific quantity and specific shape are not limited herein.

In a specific embodiment, based on FIG. 3A, please refer in detail to FIG. 5A below. FIG. 5A is a schematic diagram of another embodiment of an optical image stabilization mechanism in accordance with an embodiment of the present application. The optical image stabilization mechanism may further include a second reflector 306.

The position of the second reflector 306 is shown in FIG. 5A, and it is positioned between the first reflector 302 and the imaging surface. After being reflected by the first reflector 302, the optical signal is projected onto the second reflector 306 and reflected by the second reflector 306 onto the imaging surface.

When the first lens 301 shakes, the control component 304 is further configured to control the second reflector 306 to rotate using the second preset direction as an axis based on the shake information of the first lens 301 detected by the position sensor 303, where the second preset direction is not parallel to the first preset direction or the normal direction of the second reflector 306. Therefore, when the second reflector 306 rotates, the direction of the optical path of the optical signal is also changed by driving, thereby achieving a camera shake correction effect. It should also be noted that the rotational movement of the second reflector 306 using the second preset direction as an axis and the rotational movement of the first reflector 302 using the first preset direction as an axis can be performed simultaneously or separately, which is specifically controlled by the control component 304 based on the shake information. By simultaneously rotating the second reflector 306 using the second preset direction as its axis and rotating the first reflector 302 using the first preset direction as its axis, a two-axis image stabilization effect can be achieved.

In a specific embodiment, based on FIG. 5A, please refer in detail to FIG. 5B. FIG. 5B is a schematic diagram of another embodiment of an optical image stabilization mechanism according to an embodiment of the present application. The optical image stabilization mechanism may further include an image sensor 305 connected to the control component 304, with the photosensitive surface of the image sensor 305 being the imaging surface.

After the optical signal is projected onto the imaging surface, i.e., the photosensitive surface of the image sensor 305, the image sensor 305 detects acutance information of the image formed after the optical signal is projected onto the photosensitive surface and transmits the acutance information to the control component 304. After receiving the acutance information detected by the image sensor 305, the control component 304 controls the first reflector 302 and/or the second reflector 306 to move based on the acutance information. When the first reflector 302 and/or the second reflector 306 moves, the length of the optical path of the optical signal changes as the first reflector 302 and/or the second reflector 306 moves, and the optical path is the propagation path of the optical signal from the first lens 301 to the imaging surface.

It should be noted that the direction in which the first reflector 302 and/or the second reflector 306 move can be preset, for example, to the direction of the optical path or the normal direction of the reflective surface of the first reflector 302 and/or the second reflector 306. When the first reflector 302 and/or the second reflector 306 moves, the length of the optical path of the optical signal changes accordingly, i.e., the image distance changes, thereby enabling the optical signal to be clearly imaged on the photosensitive surface, thereby achieving a focusing effect. Figures 5A and 5B briefly explain the positional relationship between the first lens 301, the first reflector 302, the second reflector 306, and the imaging surface. Please refer to Figure 5C below. Figure 5C is a schematic diagram of an embodiment of the positional relationship between the first lens 301, the first reflector 302, and the second reflector 306.

In certain embodiments, the optical image stabilization mechanism may further include a second lens 307. For details, see FIG. 5D below. FIG. 5D is a schematic diagram of another embodiment of the positional relationship between the first lens 301, the second lens 307, the first reflector 302, and the second reflector 306. As shown in FIG. 5D, the second lens 307 is disposed between the first reflector 302 and the second reflector 306. After being reflected by the first reflector 302, the optical signal passes through the second lens 307 and is projected onto the second reflector 306. After being reflected by the second reflector 306, the optical signal passes through the second lens 307 and is finally projected onto the imaging surface. Note that the second lens 307 serves to assist in imaging and may be a convex or concave lens, and may be a single lens or a combination of multiple lenses. The specific quantities and specific forms are not limited herein.

In certain embodiments, the optical image stabilization mechanism may further include a second lens 307. For details, see FIG. 5E below. FIG. 5E is a schematic diagram of another embodiment of the positional relationship between the first lens 301, the second lens 307, the first reflector 302, and the second reflector 306. As shown in FIG. 5E, the second lens 307 is disposed between the second reflector 306 and the imaging surface. After being reflected by the second reflector 306, the optical signal passes through the second lens 307 and is finally projected onto the imaging surface. Note that the second lens 307 serves to assist in imaging and may be a convex or concave lens, and may be a single lens or a combination of multiple lenses. The specific quantity and specific form are not limited herein.

In certain embodiments, the optical image stabilization mechanism may further include a second lens 307 and a third lens 308. For details, see FIG. 5F below. FIG. 5F is a schematic diagram of an embodiment of the positional relationship between the first lens 301, the second lens 307, the third lens 308, the first reflector 302, and the second reflector 306. As shown in FIG. 5F, the second lens 307 is disposed between the first reflector 302 and the second reflector 306, and the third lens 308 is disposed between the second reflector 306 and the imaging surface. An optical signal sequentially passes through the first lens 301, the first reflector 302, the second lens 307, the second reflector 306, and the third lens 308, and is finally projected onto the imaging surface. It should be noted that the second lens 307 and the third lens 308 serve to assist in imaging, and each of the second lens 307 and the third lens 308 may be a convex lens or a concave lens, and may be one lens or a combination of multiple lenses. The specific quantity and specific shape are not limited herein.

Note that the positional relationships between the reflectors, the positional relationships between the lenses, and the positional relationships between the reflectors and the lenses incorporated in the optical image stabilization mechanism shown in Figures 3C, 3D, 4B to 4F, and 5B to 5F are used merely as illustrative examples. Specifically, the specific positions of the lenses and reflectors, such as the distance and angle between the first lens 301 and each reflector, the distance, position, and angle between the lenses, and the distance and angle between the reflectors, are not particularly limited in this embodiment of the present application. In actual applications, the specific positions of each lens and each reflector can be set based on requirements.

In a specific embodiment, based on the optical image stabilization mechanism of any specific embodiment of FIGS. 3A-3D, 4A-4F, and 5A-5F, please refer in detail to FIG. 6A below. FIG. 6A is a schematic diagram of an embodiment of a control component 304 according to an embodiment of the present application. The control component 304 includes a drive member 3041 and a processing chip 3042.

The processing chip 3042 is configured to receive shake information of the first lens 301 detected by the position sensor 303 in any of the specific embodiments of FIGS. 3A-3D, 4A-4F, and 5A-5F. After processing the shake information, the processing chip 3042 controls the driving member 3041 to drive the first reflector 302 and/or the second reflector 306 based on the results of processing the shake information to perform the rotational movement described in any of the specific embodiments of FIGS. 3A-3D, 4A-4F, and 5A-5F, thereby achieving the image stabilization function.

In certain embodiments, with reference to the control component 304 shown in FIG. 6A, the processing chip 3042 in the control component 304 is further configured to receive acutance information related to an image formed after the optical signal is projected onto the photosensitive surface and detected by the image sensor 305 in the embodiment shown in FIG. 3B or the image sensor 305 in the embodiments shown in FIGS. 4B and 5B. After processing the acutance information, the processing chip 3042 is further configured to control the driving member 3041 to drive the first reflector 302 and/or the second reflector 306 to perform the movement described in any particular embodiment of FIG. 3B, 4B, or 5B based on the result of processing the acutance information, thereby achieving a focusing effect.

In a particular embodiment, based on FIG. 6A, please refer in detail to FIG. 6B below. FIG. 6B is a schematic diagram of another embodiment of the control component 304 in accordance with one embodiment of the present application. The control component 304 may further include a VCM driver module 3043, which is connected to the processing chip 3042.

The processing chip 3042 is further configured to receive acutance information, which relates to an image formed after the optical signal is projected onto the photosensitive surface and is detected by the image sensor 305 of the embodiment shown in Figure 3B or the image sensor 305 of the embodiments shown in Figures 4B and 5B. After processing the acutance information, the processing chip 3042 is further configured to control the VCM driver module 3043 to drive the first lens 301 to move in the direction of its central axis based on the result of processing the acutance information. When the first lens 301 moves in the direction of its central axis, the length of the propagation path of the optical signal between the first lens 301 and the photosensitive surface changes, i.e., the image distance changes, thereby achieving a focusing effect.

It should be noted that the VCM driver module 3043 can drive the first lens 301 to move along the central axis and the drive member 3041 can drive the first reflector 302 and/or the second reflector 306 to move simultaneously or separately. When the VCM driver module 3043 drives the first lens 301 to move along the central axis and the drive member 3041 drives the first reflector 302 and/or the second reflector 306 to move simultaneously, fine focusing or coarse focusing functions can be achieved. Coarse focusing means that a wider focus range is achieved.

In the above embodiment shown in Figures 6A and 6B, the drive components 304 of the optical image stabilization mechanism are briefly described, and the drive member 3041 is further described below.

In certain embodiments, the driving method used by the driving member 3041 in the process of rotating or translating the reflector may be magnetoelectric driving, piezoelectric driving, or another type of driving. This embodiment of the present application is not limited to any particular driving method.

In a specific embodiment, based on the optical image stabilization mechanism of any of the embodiments shown in Figures 3A-3D, 4A-4F, or 5A-5F, please refer to Figure 7A below in detail. The optical image stabilization mechanism further includes a first outer frame 309 and a first cantilever beam 310. Figure 7A is a schematic diagram of an embodiment of a driving member 3041 according to one embodiment of the present application. The driving member 3041 may include a first coil 30411 and a first magnet 30412.

As shown in FIG. 7A, the first reflector 302 is connected to the first outer frame 309 using a first cantilever beam 310, a first coil 30411 is fixed to the rear surface or edge position of the first reflector 302, and a first magnet 30412 is fixed to the first outer frame 309.

The first coil is an "∞-shaped" coil shown in FIG. 7A, divided into a left half coil and a right half coil, and is bilaterally symmetrical. After power is applied to the first coil 30411, an inward ampere force perpendicular to the first reflector 302 is generated under the action of the magnetic field between the left half coil and the first magnet 30412, and an outward ampere force perpendicular to the first reflector 302 is generated under the action of the magnetic field between the right half coil and the first magnet 30412. These forces drive the first reflector 302 to rotate about the second rotation axis. When it is necessary to control the first reflector 302 to rotate in the opposite direction, a current in the opposite direction to that shown in FIG. 7A is supplied to the first coil 30411.

After receiving the shaking information of the first lens 301 detected by the position sensor 303, the processing chip 3042 processes the shaking information and controls the amount of power applied to the first coil 30411 based on the processing result. After power is applied to the first coil 30411, under the effect of the magnetic field of the first magnet 30412, opposite ampere forces are generated in the left and right halves of the first coil 30411, respectively. These forces drive the first reflector 302, which is fixedly connected to the first coil 30411, to rotate using the first preset direction as an axis. The rotation axis may be the first cantilever, in which case the first preset direction is the direction of the first cantilever.

Please note that the processing chip 3042 controls the amount of power applied to the first coil 30411, including controlling the direction and value of the current in the first coil 30411, based on the processing results, to control the direction of rotation of the first reflector 302 and the value of the rotation angle of the first reflector 302.

In a specific embodiment, based on the driving member 3041 of the embodiment shown in FIG. 7A, please refer to FIG. 7B below in detail. The optical image stabilization mechanism further includes a support frame 311. FIG. 7B is a schematic diagram of another embodiment of the driving member 3041 according to an embodiment of the present application. The driving member 3041 may further include a second coil 30413.

7B, the second coil 30413 is fixed to the rear surface or edge of the first reflector 302 and is insulated from the first coil 30411. The support frame 311 is connected to the first reflector 302 using a first axis of rotation and to the first outer frame 309 using a second axis of rotation.

The second coil 30413 is a "figure-eight" coil, similar to the shape obtained after rotating the first coil by 90°. It is divided into an upper half coil and a lower half coil and is longitudinally symmetric. After power is applied to the second coil 30413, an inward ampere force perpendicular to the first reflector 302 is generated under the action of the magnetic field between the upper half coil and the first magnet 30412, and an outward ampere force perpendicular to the first reflector 302 is generated under the action of the magnetic field between the lower half coil and the first magnet 30412. These forces drive the first reflector 302 to rotate about the second rotation axis. When it is necessary to control the first reflector 302 to rotate in the opposite direction, a current in the opposite direction to that shown in FIG. 7B is supplied to the second coil 30413.

After receiving the shaking information of the first lens 301 detected by the position sensor 303, the processing chip 3042 processes the shaking information and, based on the processing result, controls the amount of power applied to the second coil 30413. After the power is applied to the second coil 30413, under the action of the magnetic field of the first magnet 30412, opposite ampere forces are generated in the upper and lower halves of the second coil 30413, respectively, which drive the first reflector 302 fixedly connected to the second coil 30413 to rotate using the second preset direction as an axis.

In this embodiment, the first preset direction is the direction of the second axis of rotation, and the second preset direction is the direction of the first axis of rotation.

In a specific embodiment, based on the optical image stabilization mechanism of any of the embodiments shown in FIGS. 4A to 4F or 5A to 5F, please refer to FIG. 7C below in detail. The optical image stabilization mechanism further includes a second outer frame 312 and a second cantilever beam 313. FIG. 7C is a schematic diagram of another embodiment of a driving member 3041 according to an embodiment of the present application. The driving member 3041 may further include a second coil 30413 and a second magnet 30414.

As shown in FIG. 7C, the second reflector 306 is connected to the second outer frame 312 using a second cantilever beam 313, a second coil 30413 is fixed to the rear surface or edge of the second reflector 306, and a second magnet 30414 is fixed to the second outer frame 312. The second coil 30413 is a "figure-eight" coil as shown in FIG. 7C.

After receiving the shaking information of the first lens 301 detected by the position sensor 303, the processing chip 3042 processes the shaking information and, based on the processing result, controls the amount of power applied to the second coil 30413. After the power is applied to the second coil 30413, under the action of the magnetic field of the second magnet 30414 , opposite ampere forces are generated in the upper and lower halves of the second coil 30413, respectively, and these forces drive the second reflector 306 fixedly connected to the second coil 30413 to rotate using the second preset direction as an axis.

In this embodiment, the second preset direction may be the direction of the second cantilever beam 313.

In certain embodiments, the optical image stabilization mechanism includes a first outer frame 309 and a support frame 311, based on the optical image stabilization mechanism of the embodiment shown in FIG. 3B, FIG. 4B, or FIG. 5B. For details, see FIG. 7D below. FIG. 7D is a schematic diagram of an embodiment of a drive member 3041 according to one embodiment of the present application. The drive member 3041 may include a first coil 30411, a first magnet 30412, a second coil 30413, and a third coil 30414.

For the first coil 30411 and the first magnet 30412, please refer to the relevant description of the first coil 30411 and the first magnet 30412 in the embodiment shown in FIG. 7A. For the support frame 311 and the second coil 30413, please refer to the relevant description of the support frame 311 and the second coil 30413 in the embodiment shown in FIG. 7B. Details will not be described again here.

As shown in FIG. 7D, the third coil 30414 is fixed to the rear surface or edge of the first reflector 302 and is insulated from the first coil 30411 and the second coil 30413. Alternatively, the third coil 30414 can be fixed to the support frame 311.

After receiving acutance information related to the image formed after the optical signal is projected onto the photosensitive surface and detected by the image sensor 305, the processing chip 3042 processes the acutance information and controls the amount of power applied to the third coil 30414 based on the processing results. After power is applied to the third coil 30414, an Ampere force perpendicular to the plane in which the third coil 30414 is disposed is generated under the action of the magnetic field of the first magnet 30412, and this force drives and moves the first reflector 302, which is fixedly connected to the third coil 30414. Note that the processing chip 3042 controls the amount of power applied to the third coil 30414 based on the processing results, including controlling the current direction and value of the current in the third coil 30414, to control the magnitude and direction of the movement of the first reflector 302.

In certain embodiments, the third coil 30414 of the driving member 3041 shown in FIG. 7D may alternatively be disposed on the second reflector 306 of the driving member 3041 shown in FIG. 7C, and may be specifically fixed to the rear surface or edge position of the second reflector 306, and insulated from the second coil 30413. The specific arrangement is similar to that shown in FIG. 7D, and the details will not be described again here.

In a specific embodiment, based on the optical image stabilization mechanism of any of the embodiments shown in Figures 3A to 3D, 4A to 4F, or 5A to 5F, please refer to Figure 7E below in detail. The optical image stabilization mechanism further includes a first outer frame 309 and a support frame 311. Figure 7E is a schematic diagram of another embodiment of a driving member 3041 according to an embodiment of the present application. The driving member 3041 may include a first coil 30411, a first electromagnet 30412, a second electromagnet 30413, a third electromagnet 30414, and a fourth electromagnet 30415. The structure of the support frame 311 is similar to the structure of the support frame 311 described in Figure 7B, and the details will not be described again here.

As shown in FIG. 7E, the first coil 30411 is a rectangular coil or a square coil, and a clockwise or counterclockwise current can flow through the first coil 30411. The first reflector 302 is connected to the support frame 311 using a second rotation axis, and the support frame 311 is connected to the outer frame 309 using a first rotation axis. The first coil 30411 is positioned and fixed to the rear surface or edge position of the first reflector 302, and the first electromagnet 30412 and the second electromagnet 30413 are separately fixed to the outer frame 309.

After receiving the shaking information of the first lens 301 detected by the position sensor 303, the processing chip 3042 processes the shaking information and, based on the processing results, controls the power applied to the first coil 30411, for example, controlling the current value and direction, so that Ampere forces in the same or different directions are generated on each of the four sides of the first coil under the action of the magnetic field. These forces drive the first reflector 302, which is fixedly connected to the first coil, to perform rotational or rotational movement, thereby realizing the image stabilization function or focusing function.

For example, as shown in FIG. 7E, the current shown is applied to the first coil 30411, the second electromagnet 30413 and the fourth electromagnet 30415 are controlled so as not to generate a magnetic field (in other words, no power is applied to the coils of the second electromagnet 30413 and the fourth electromagnet 30415), and the first electromagnet 30412 and the third electromagnet 30414 are controlled to generate the same magnetic field shown in FIG. 7E. Thus, with reference to FIG. 7E, it can be seen that the conductors of the upper and lower halves of the first coil 30411 interact separately with the magnetic field, thereby generating ampere forces in opposite directions that rotate the first reflector 302 about the first axis of rotation. Similarly, the second electromagnet 30413 and the fourth electromagnet 30415 can alternatively be controlled to generate magnetic fields in the same direction, while the first electromagnet 30412 and the third electromagnet 30414 are controlled not to generate a magnetic field. In this manner, the first reflector is controlled to rotate about the second axis of rotation. Similarly, with reference to FIG. 7E , it can be seen that other cases of movement or rotation can alternatively be implemented by controlling the power applied to the first coil 30411 and the magnetic fields of the first electromagnet 30412, the second electromagnet 30413, the third electromagnet 30414, and the fourth electromagnet 30415. The details will not be described again here.

The aforementioned accompanying drawings illustrate the components of the optical image stabilization mechanism. For details, please refer to FIG. 8 below. With reference to the structures shown in FIGS. 6B and 7D, a method for controlling the movement of the first reflector 302 and the first lens 301 based on the wobble information and the acutance information will be described below. FIG. 8 is a schematic diagram of an embodiment of a control method according to an embodiment of the present application. The method may include the following steps:

S801: The optical image stabilization mechanism detects shake information of the first lens 301.

In a specific embodiment, when the first lens 301 shakes, the position sensor 303 of the optical image stabilization mechanism detects shaking information such as the shaking displacement, shaking frequency, and shaking direction of the first lens 301. Please note that the position sensor 303 in this specification does not refer to a special sensor, but generally refers to a sensor that can detect shaking information of the first lens 301.

In certain embodiments, after the optical signal is projected onto the photosensitive surface of the image sensor 305, the image sensor 305 detects acutance information of the image formed on the photosensitive surface by the optical signal.

S802: The optical image stabilization mechanism determines a first control parameter based on the shake information.

In a specific embodiment, after receiving the sway information detected by the position sensor 303, the processing chip 3042 processes the sway information according to a preset first algorithm to obtain a first control parameter. The preset first algorithm may then be updated using a network or based on setting parameters input by a user. The first control parameter may specifically be a parameter that instructs the first reflector 302 to rotate. Specifically, the first control parameter may include rotation direction information and rotation angle information.

In a specific embodiment, after receiving the acutance information detected by the image sensor 305, the processing chip 3042 processes the acutance information according to a second preset algorithm to obtain second control parameters. The second preset algorithm can then be updated using a network or based on setting parameters input by a user. The second control parameters include a parameter that instructs the first reflector 302 to move and a parameter that instructs the first lens 301 to move. Specifically, the second control parameters can include movement direction information and movement distance information.

S803: The optical image stabilization mechanism controls the first reflector 302 to rotate using the control component 304 based on the first control parameter.

In certain embodiments, after determining the first control parameter, the optical image stabilization mechanism can determine the direction and value of the current that needs to be loaded into the first coil 30411 and the direction and value of the current that needs to be loaded into the second coil 30413 based on the first control parameter. This process can be performed using a preset third algorithm. The third algorithm can then be updated using a network or based on setting parameters entered by the user.

In certain embodiments, after determining the second control parameter, the optical image stabilization mechanism can determine the current direction and current value that needs to be loaded into the third coil 30414 and the current direction and current value that needs to be loaded into the VCM driver module 3043 based on the second control parameter. This process can be performed using a preset fourth algorithm. The fourth algorithm can then be updated using a network or based on setting parameters entered by the user.

It should be noted that the operation of the control component 304 controlling the first reflector 302 to rotate, the operation of the control component 304 controlling the first reflector 302 to move, and the operation of the VCM driver module 3043 controlling the first lens 301 to move can be performed simultaneously or separately. For details, please refer to the description of step S803. After power is specifically applied to the first coil 30411, the second coil 30413, the third coil 30414, and the VCM driver module 3043, the functional effects that can be achieved by the first coil 30411, the second coil 30413, the third coil 30414, and the VCM driver module 3043 are shown in Table 1 below. Table 1 is a summary table of the image stabilization effects and/or focusing effects that can be achieved in various power application cases.

As shown in Table 1, + indicates that power is applied and a specific direction of the current is set based on parameters obtained by calculation. 0 indicates the case where no power is applied. Image Stabilization 1 indicates the image stabilization effect that can be achieved when power is applied to the first coil 30411 and then the first reflector 302 is driven to rotate about the second axis of rotation. Image Stabilization 2 indicates the image stabilization effect that can be achieved when power is applied to the second coil 30413 and then the first reflector 302 is driven to rotate about the first axis of rotation. Focusing 1 indicates the focusing effect that is achieved when the first reflector 302 moves. Focusing 2 indicates the focusing effect that is achieved when the VCM driver module 3043 drives the first lens 301 to translate along the central axis. Image stabilization and focusing can be performed simultaneously, and focusing 1 + focusing 2 allows for a wider range of focusing and fine focusing.

For the purpose of simple and concise description, it will be clearly understood by those skilled in the art that the detailed operation processes of the above-mentioned systems, devices, and units should be referred to the corresponding processes of the above-mentioned method embodiments. The details will not be described again here.

In some embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the described device embodiments are merely examples. For example, the division into units is merely a division of logical functionality, and actual implementation may result in other divisions. For example, multiple units or components may be combined or integrated into another system, and some functions may be ignored or not performed. Furthermore, the shown or discussed mutual couplings or direct couplings or communication connections may be realized via some interfaces. Indirect couplings or communication connections between devices or units may be realized in electronic, mechanical, or other forms.

Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, located in a single location, or distributed across multiple network units. Some or all of the units may be selected based on actual requirements to achieve the objectives of the solution of the embodiment.

The above embodiments are merely intended to illustrate the technical solutions of the present application, and are not intended to limit the present application. Although the present application has been described in detail with reference to the above embodiments, it should be understood that those skilled in the art can further modify the technical solutions described in the above embodiments or make equivalent substitutions for some technical features thereof without departing from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims (9)

An optical image stabilization mechanism, the optical image stabilization mechanism comprising:
the position sensor is connected to the control component, the control component includes a first coil and a second coil, first and second magnets respectively provided on first and second side surfaces facing each other on an inner surface of the outer frame, and third and fourth magnets respectively provided on third and fourth side surfaces facing each other on the inner surface of the outer frame are fixed to the outer frame, the first and second side surfaces are orthogonal to the third and fourth side surfaces, both the first coil and the second coil are fixed to a rear surface of the first reflector and are insulated from each other, the first coil is an ∞-shaped coil, the second coil is an 8-shaped coil obtained by rotating the first coil by 90 ° , the magnetic fields of the first and second magnets are oriented inward with respect to the outer frame, and the magnetic fields of the third and fourth magnets are oriented inward with respect to the outer frame,
an optical signal is transmitted to the first reflector after passing through the first lens;
the first reflector reflects the received optical signal, and the reflected optical signal is projected onto an imaging surface, the imaging surface being a photosensitive surface of an image sensor;
the position sensor is configured to detect wobble information of the first lens and transmit the wobble information to the control component;
the control component is configured to control the first reflector to rotate using a first preset direction and a second preset direction as axes based on the sway information, the first preset direction is not parallel to a normal direction of the first reflector, the second preset direction is not parallel to the first preset direction and the normal direction of the first reflector, and the first and second coils fixed to the first reflector are symmetrical with respect to the first preset direction and the second preset direction.
Optical image stabilization mechanism. the optical image stabilization mechanism further includes an image sensor connected to the control component;
the image sensor is configured to detect acutance information of an image formed after the optical signal is projected onto the photosensitive surface;
2. The optical image stabilization mechanism according to claim 1, wherein the control component controls the first reflector to move along a normal direction of a reflective surface of the first reflector based on the acutance information, and the length of an optical path of the optical signal changes as the first reflector moves, and the optical path is a propagation path of the optical signal from the first lens to the imaging surface. 2. The optical image stabilization mechanism of claim 1, further comprising: a support frame within the outer frame; a first beam connecting the outer frame and the support frame ; and a second beam connecting the support frame and the first reflector; and the control component includes a processing chip configured to control, based on the shaking information, an amount of power applied to the first coil to generate opposite forces on either side of the first reflector, whereby the first reflector rotates using the second preset orientation as the axis. 3. The optical image stabilization mechanism of claim 2 , wherein the control component includes a processing chip configured to control, based on the acutance information, an amount of power applied to a third coil to generate a force on the first reflector in the same direction, thereby moving the first reflector. 5. The optical image stabilization mechanism of claim 1, wherein the control component includes a voice coil motor ( VCM) driver module configured to drive the first lens to move in the central axis direction based on acutance information. A control method for use in an optical image stabilization mechanism, comprising:
The optical image stabilization mechanism includes a first lens, a first reflector, a position sensor , a control component , and an outer frame surrounding the first reflector , the control component includes a first coil and a second coil, first and second magnets respectively provided on first and second side surfaces facing each other on an inner surface of the outer frame, and third and fourth magnets respectively provided on third and fourth side surfaces facing each other on the inner surface of the outer frame are fixed to the outer frame, the first and second side surfaces and the third and fourth side surfaces are orthogonal to each other, both the first coil and the second coil are fixed to a rear surface of the first reflector and are insulated from each other, the first coil is an ∞-shaped coil, and the second coil is a 90°-angled coil. a figure-8 shaped coil obtained after rotating the coil by 1° , wherein the magnetic fields of the first and second magnets are directed inward with respect to the outer frame, and the magnetic fields of the third and fourth magnets are directed inward with respect to the outer frame, and an optical signal is reflected by the first reflector after passing through the first lens and projected onto a photosensitive surface of an image sensor, and the control method includes:
Detecting shake information of the first lens using the position sensor;
determining a first control parameter based on the sway information;
and controlling the control component to rotate the first reflector using a first preset direction and a second preset direction as axes based on the first control parameter;
the first preset direction is not parallel to a normal direction of the first reflector, the second preset direction is not parallel to the first preset direction and the normal direction of the first reflector, and the first and second coils fixed to the first reflector are symmetrical with respect to the first preset direction and the second preset direction.
Control method. The optical image stabilization mechanism further includes the image sensor, and the control method includes:
using the image sensor to detect acutance information of an image formed after the optical signal is projected onto the photosensitive surface;
determining a second control parameter based on the sway information and the acutance information;
7. The control method according to claim 6, further comprising: using the control component to control, based on the second control parameter, to move the first reflector and/or the first lens along a normal direction of a reflective surface of the first reflector. The step of controlling the control component to rotate the first reflector based on the first control parameter includes:
8. The control method of claim 7, further comprising: controlling a power application state of the first coil and a power application state of the second coil based on the first control parameter, wherein the power application state includes a current value and a current direction of the applied power; and after power is applied to the first coil and power is applied to the second coil, forces in opposite directions on both sides of the first reflector and forces in opposite directions on both sides of the first reflector are generated separately under the action of magnetic fields of the first to fourth magnets , thereby causing the first reflector to rotate separately using the first preset direction as an axis and using the second preset direction as an axis. the control component further includes a third coil and a voice coil motor (VCM) driver module, the third coil being fixed to the rear surface of the first reflector and insulated from the first coil and the second coil, the VCM driver module being connected to the first lens;
The step of controlling the movement of the first reflector and/or the first lens using the control component based on the second control parameter includes:
controlling a power application state of the third coil and a power application state of the VCM driver module based on the second control parameter, the power application state including a current value and a current direction of the applied power;
9. The control method of claim 8, wherein after applying power to the third coil, the first reflector is driven to move under the action of the magnetic fields of the first to fourth magnets, and after applying power to the VCM driver module, the first lens is driven to move.